Identification and Demonstration of a Technology Adaptable to Locating Water in Post-tensioned Bridge Tendons

The research team has identified a technology with great potential for identifying and locating water in post-tensioned bridge members. This project called for the identification of a technology that can be developed to find hazardous materials in civil structures — specifically, water in post-tensioned bridge tendons. Florida Department of Transportation (FDOT) needs the ability to locate this water in a reliable, non-destructive way. Currently, FDOT spends time and energy checking the condition of individual strands and reacting to any troubled strand by searching for bleed water at its most likely location. The search, however, has been conducted using destructive methods that are not as reliable as desired. By using non-destructive methods to locate the water early, the water can be removed before damage is done to the strands. Also only those locations where state engineers are certain of the location of water will be disturbed. The days of blind, destructive searches will be over. The research team tested four technologies for their potential to provide a non-destructive, accurate, and efficient method for identifying and locating this harmful bleedwater. These technologies were ultrasonic sound waves, ground-penetrating radar, impact echo, and gamma-ray spectroscopy. Gamma-ray spectroscopy shows, by far, the most potential for development.


  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; Tables;
  • Pagination: v.p.

Subject/Index Terms

Filing Info

  • Accession Number: 01044272
  • Record Type: Publication
  • Report/Paper Numbers: Project Number 52084, BD545-45
  • Contract Numbers: 54484
  • Created Date: Mar 3 2007 6:40AM